Journal•ISSN: 1861-194X
Synfacts
Georg Thieme Verlag
About: Synfacts is an academic journal published by Georg Thieme Verlag. The journal publishes majorly in the area(s): Chemistry & Catalysis. It has an ISSN identifier of 1861-194X. Over the lifetime, 9718 publications have been published receiving 5051 citations.
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TL;DR: In this article, powder x-ray diffraction studies of the highly crystalline products (C3H2BO)6 (C9H12)1 (COF-1) and C9H4BO2 (CF-5) revealed expanded porous graphitic layers that are either staggered or eclipsed.
Abstract: Covalent organic frameworks (COFs) have been designed and successfully synthesized by condensation reactions of phenyl diboronic acid {C6H4[B(OH)2]2} and hexahydroxytriphenylene [C18H6(OH)6]. Powder x-ray diffraction studies of the highly crystalline products (C3H2BO)6.(C9H12)1 (COF-1) and C9H4BO2 (COF-5) revealed expanded porous graphitic layers that are either staggered (COF-1, P6(3)/mmc) or eclipsed (COF-5, P6/mmm). Their crystal structures are entirely held by strong bonds between B, C, and O atoms to form rigid porous architectures with pore sizes ranging from 7 to 27 angstroms. COF-1 and COF-5 exhibit high thermal stability (to temperatures up to 500 degrees to 600 degrees C), permanent porosity, and high surface areas (711 and 1590 square meters per gram, respectively).
795 citations
185 citations
TL;DR: In this article, the authors discuss the mechanistic investigation, reaction scope, and synthetic application of Ir-catalyzed asymmetric allylic substitution reactions and classify them according to different types of nucleophiles such as C, N, O, and S.
Abstract: Ir-catalyzed asymmetric allylic substitution reactions have been reviewed. This chapter discusses respectively the mechanistic investigation, reaction scope, and synthetic application of Ir-catalyzed allylic substitution reactions. The reaction scope is classified according to different types of nucleophiles such as C, N, O, and S.
152 citations
74 citations